SI8435-B-IS

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Digital Isolators

Digital Isolators are semiconductor-based isolators used to electrically and optically isolate two or more circuits. SI8435-B-IS is a type of digital isolation device based on opto-coupler technology.

Application Field of SI8435-B-IS

The SI8435-B-IS digital isolator has a wide range of applications. It is widely used in industrial automation, commercial programming systems, telecommunications systems, medical systems and other control devices. It is ideal for signal transmission, noise filtering and surge protection. It can also be used to protect sensitive circuits, such as analog circuits, from external interference and isolation.

Working Principle of SI8435-B-IS

SI8435-B-IS digital isolators use an opto-coupled signal transmission system to achieve electrical isolation. It consists of an emitter, a collector, and an oxide-filled silicon junction. The emitter module consists of a gallium arsenide infrared LED (light-emitting diode) and a phototransistor photodiode. The light-emitting diode of the emitter module is placed in series with the input circuit and generates a current in response to changes in the input voltage. This current is used to activate the phototransistor of the collector module and control the output voltage. As a result, the input voltage is isolated from the output voltage.

In addition, the SI8435-B-IS digital isolator has a voltage multiplier circuit. This circuit further isolates the input and output circuits by multiplying the input voltage by several factors, depending on the selected parameters. This ensures that the circuits are isolated from each other, despite the presence of high voltage levels, which can damage sensitive electronic components.

The SI8435-B-IS digital isolator also has low output edge rates which helps to reduce EMI (electromagnetic interference) noise and ESD (electrostatic discharge) susceptibility. Furthermore, the device also has good insulation, surge, and dielectric strength properties.

Conclusion

The SI8435-B-IS digital isolator is a semiconductor-based isolation device which is specifically designed for industrial automation, programming systems, telecommunications, medical systems and other control applications. It uses an opto-coupled signal transmission system to achieve electrical isolation and has additional features such as voltage multiplier circuit, low output edge rates and good insulation, surge and dielectric strength properties.

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